Grinding-machine.



Patented Ian. 22, I90l.

J. MACPHAIL.

GRINDING MACHINE.

(Application filed Feb. 23, 1900.)

2 Sheets-Shut I.

(No Model.)

mi nonms PETERS co. Mote-Lnua. wnwxarcx :1 c.

No. 666,349. Patented Ian. 22, 1901; J. MACPHAIL.

GRINDING MACHINE.

(Application filed Feb. 23. 1900.)

2 Sheets-Sheet 2.

(No Model.)

- li is W m: non ms PETERS 0'0. momma, whsumafon. n. c

UNTTEE STATES PATENT EETcE.

JAMES MAOPHAIL, OF BLUE ISLAND, ILLINOIS.

GRINDING-MACHINE.

SFPECIF-JGATION forming part of Letters Patent No. 666,39, dated-January 22, 1901.

Application filed February 23, 1900. Serial No. 6,316. (No model.)

To all whom it may concern:

Be it known that I, JAMES MAOPHAIL, a citizen of the United States of America, residing at Blue Island, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Grinding-Machines, of which the following is a specification.

Myinvention relates to grinding-m achines and its object is to produce machines adapted not only for grinding harvester-knives and the like, but also for grinding miscellaneous articles.

My machine embodies novel construction, adjustment of parts, and mode of operation.

Referring to the accompanying drawings, which form a part of this specification, Figure 1 is aside elevation of a grinding-machine embodying my invention. Fig. 2 is a top plan view of the same minus the harvesterknife holder. Figs. 3 to 6, inclusive, are detailed views of parts of the main frame, oscillatory frame, and semibifurcated lever of the machine.

Like letters of reference indicate corresponding parts throughout the several views.

The main frame of the machine consists of a base portion A, an up wardly-exte'nding portion A, and a horizontal portion A the latter having an upwardly-opening slot A and a bearing A' therein, the purposes whereof will be explained hereinafter.

B is an oscillatory frame pivot-jointed by one end B by means of the stud-bearing B to the horizontal portion A of the main frame.

B is a grinding-wheel composed of corundum, emery, or similar material mounted by means of the shaft B and the bearings B in the oscillatory frame B, near the free end B thereof.

B is a pinion fast to the shaft B B is an upwardly-opening slot in the oscillatory frame B registering with a like slot A in the part A of the main frame.

B is a downwardly-opening slot in the oscillatory frame B.

O O are a bolt and thumb-nut for rigidly securing the oscillatory frame B to the part A of the main frame through the slots A B therein, while the free end B of the same is elevated to any desired point in the arc of its vibration, the lower limit of such vibration being indicated by'the dotted circle X and its upper limit being indicated, approximately, by the position of X.

D is a semibifurcated lever mounted at the base D of its bifurcation D on the stud-bearing B concentrically with the oscillatory frame B, the unbifurcated end portion D thereof lapping by and extending along substantially parallel with the pivoted end portion B of such frame B.

D is an upwardly-opening slot in the semibifurcated lever D registering with a slot B in the oscillatory frame B.

E E are a bolt and thumb-nut for securing the overlapping ends D B of the semibifurcated lever D and oscillatory frame B to gether while the free end B of the latter is at any desired point in the arc of its vibration--an arc of a circle extending, say, between X and X.

F F are an integral or rigidly-connected gear and eccentric concentrically mounted on a stud-bearing F on the horizontal portion A of the main frame in such position that the eccentric F contacts the bifurcation D of the semibifurcated lever D.

G G are a gear-wheel and a pinion, concentric and integral or rigidly connected, mounted concentrically with the oscillatory frame B and semibifurcated lever D on the studbearing B the gear-wheel G meshing with the pinion B on the grinding-wheel shaft B and the pinion G meshing with the gear F of the gear and eccentric F F.

His a balance-wheel, of corundum, emery, or any desired material, mounted, by means of a shaft H and bearing A, in the horizontal portion A of the main frame.

H is a pinion fast to the shaft H and meshing with the gear-wheel G.

I is a harvester-knife holder pivot-jointed at I to the bracket 1 which is secured to the base portion A of the machine-frame.

I is a set-screw for regulating the tilt of the holder 1.

I is a hand-lever for holding the sections of a harvester-knife (not shown) through the holder I in contact with the beveled face of the grinding-wheel B My machine, being constructed as hereinbefore set forth, is operated'as follows: Preparatory to grinding the sections of harvesterknives it is often desirable to either raise or lower the grinding-wheel 13 This is accomplished by loosening the thumb-nut E 011 the bolt E and then elevating or depressing the free end B of the oscillatory frame 13 until such grinding-wheel B therein is at the desired point, and then retightening the thumbnut E again. The harvester-knife (not shown) is then slid longitudinally through the holder I until the center of the grinding-wheel B is at a point midway between the first two sections of such harvester-knife. By means of the hand-lever I the sections of the knife may then be held into contact with the grinding-wheel Power is then applied to the gear-wheel G and communicated therefrom, through the parts G, F, F, and D, to the oscillatory frame B, an d also therefrom, through the pinion B and shaft 13*, to the grindingwheel B The impulse imparted through the first set of instrumentalities will vertically oscillate the grinding-wheel B and the impulse imparted through the second set of instrumentalities will simultaneously rotate such wheel B Whenever it is desirable to dispense with the oscillatory motion of the grinding-wheel B as is often the case when nicks are being ground out of harvester-knife sections, loosen the thumb-nut E on the bolt E and tighten the thumb-nut O on the bolt 0, thereby rigidly securing the oscillatory frame B to the part A of the main frame, and thus rendering it stationary.

The wheel I'I serves admirably as a balancewheel for the wheel B and vice versa. The former is adapted for use as a miscellaneous grinder, 7

What I claim as new, and desire to secure by Letters Patent, is

1. In a grinding-machine, in combination, a main frame, an oscillatory frame pivotjointed, by one end, to the main frame, and carrying a rotatable grinding-wheel, mounted therein near the free end thereof, a semibifurcated lever mounted, at the base of its bifurcation, concentrically with the oscillatory frame, the unbifurcated end portion thereof lapping by, and extending along substantially parallel with, the pivoted end portion of the oscillatory frame, means for securing the overlapping ends of the semibifurcated lever and the oscillatory frame together, while the free end of the latter is at any desired point in the arc of its vibration, an integral or rigidlyconnected gear and eccentric, concentrically mounted, on the main frame, in such position that the eccentric contacts the bifurcation of the semibifurcated lever, a gear-wheel and a pinion, concentric-and integral, or rigidly connected, mounted concentrically with the oscillatory frame and the semibifurcated lever, the former meshing with a pinion on the grinding-wheel shaft and the latter meshing with the gear of the gear and eccentric, substantially as and for the purpose specified.

2. In a grinding-machine, in combination, a main frame, an oscillatory frame pivotjointed by one end, to the main frame, and carrying a rotatable grinding-wheel,m0unted therein near the free end, a semibifurcated lever mounted, at the base of its bifurcation, concentrically with the oscillatory frame, the unbifurcated end portion thereof, lapping by, and extending along substantially parallel with, the pivoted end portion of the oscillatory frame, means for securing the overlapping ends of the semibifurcated lever and the oscillatory frame together, while the free end of the latter is at any desired point in the arc of its vibration, a grinding-wheel, of any desired material, mounted on hearings in the main frame, an integral or rigidly-connected gear and eccentric, concentrically mounted, on the main frame, in such position that the eccentric contacts the bifurcation of the semibifurcated lover, a gear-wheel and a pinion concentric and integral, mounted concentrically with the oscillatory frame and the semibifurcated lever, the former meshing with the pinions on the balance-wheel and grinding-wheel shafts and the latter meshing with the gear of the gear and eccentric, substantially as and for the purpose specified.

3. In a grinding-machine, in combination, an oscillatory frame pivot-jointed, by one end, to the main frame, and carrying a rotatable grinding-wheel, mounted therein at the free end thereof, a grinding-wheel, of any desired material, mounted on a bearing in the main frame, agear-wheel mounted concentrically with the oscillatory frame, and meshing with the pinions 0n the stationary grinding-wheel and vibrating grinding wheel shafts, and means for rigidly securing the oscillatory frame to the main frame, while the free end of the former is elevated to any desired point in the arc of its vibration, substantially as and for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JAMES MAOPI-IAIL.

\Vitnesses:

S. E. DARBY, E. O. SEMPLE.

IIO 

